Has there ever been a 9–1 in MLS?

Never.

It would be a scorigami. Based on the average number of goals in MLS, the chance of a game ending 9–1 is about 1 in 42,281.

Nearby scores

1. 10–0 Never
2. 10–1 Never
3. 10–2 Never
4. 9–0 Never
5. 9–1 Never
6. 9–2 Never
7. 8–0 Never
8. 8–1 1 time
9. 8–2 Never